Destructuring
// Before:
var width = 200;
var height = 400;
// After:
let [width, height] = [200, 400];
// before:
const calculateArea = (areaParameters) => areaParameters[0] * areaParameters[1]
calculateArea([200, 400]);
// or for better naming in older functions:
const calculateArea = ([width, height]) => width * height
calculateArea([200, 400]);
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